Texas Instruments LM3410YMFE/NOPB

Overview

LM3410YMFE/NOPB from Texas Instruments is a constant-current, 525-kHz boost/SEPIC LED driver IC with internal NMOS switch (170 mΩ), 190-mV feedback reference, and PWM dimming capability. It operates from 2.7 V to 5.5 V input, delivers up to 24 V output, supports 2.8-A peak switch current, and targets space-constrained LED backlight and flash applications in handheld and automotive systems.

For engineers reviewing the LM3410YMFE/NOPB datasheet, LM3410YMFE/NOPB pinout, LM3410YMFE/NOPB application, or LM3410YMFE/NOPB equivalent, key selection criteria include switching frequency (525 kHz), internal compensation, thermal shutdown (165°C), ultra-low shutdown current (80 nA), and WSON-6 package compatibility with high-density PCB layouts.

Technical Context

The LM3410YMFE/NOPB implements current-mode PWM control with internal slope compensation and fixed 525-kHz oscillator. It regulates LED current via feedback voltage (190 mV) across an external sense resistor, using cycle-by-cycle current limiting (2.8-A typical) and thermal shutdown (165°C trip).

Its architecture integrates a 170-mΩ NMOS power switch, internal soft-start, undervoltage lockout (2.65 V rising), and logic-level DIM pin supporting 0–100% PWM dimming at frequencies up to 25 kHz - enabling precise brightness control without external controllers.

Key Specifications

Pinout & Package

LM3410YMFE/NOPB uses a 6-pin WSON package (3.0 mm × 3.0 mm, 0.5-mm pitch) with exposed thermal pad (DAP) connected to PGND/AGND. The DAP requires ≥4 vias to inner-layer ground plane for thermal performance (R_θJA = 55.3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Compared with LM3410YMFE/NOPB, the LM3410XMF/NOPB trades efficiency for miniaturization, while the TPS61061DRVR sacrifices peak current and topology flexibility for integration and lower system cost - making LM3410YMFE/NOPB optimal for mid-power, thermally demanding, or SEPIC-required designs.

Availability

LM3410YMFE/NOPB is available at Aetrix Electronics and suitable for LED backlight, automotive interior lighting, handheld flash, and Li-ion powered OLED driver applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.

Supply support for LM3410YMFE/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.

The LM3410 product line was designed specifically for efficient, compact constant-current LED driving in space- and thermal-constrained applications - emphasizing internal compensation, wide input range, and automotive-grade reliability.

FAQ

What is the maximum LED string voltage supported by LM3410YMFE/NOPB?

The LM3410YMFE/NOPB supports output voltages up to 24 V, enabling it to drive up to seven 3.4-V white LEDs in series (23.8 V) while maintaining regulation margin. This limit is defined by the absolute maximum SW pin voltage rating of 26.5 V and the device's ability to sustain duty cycles up to 95% in boost configuration. Exceeding 24 V risks violating safe operating area limits under transient conditions.

Does LM3410YMFE/NOPB require external compensation components?

No, LM3410YMFE/NOPB features fully internal compensation, eliminating the need for external RC networks or type-II/type-III compensators. This simplifies design, reduces bill-of-materials count, and improves immunity to layout parasitics - confirmed in TI's SNVS541H datasheet Section 7.1 and Typical Application schematics. All stability is achieved via on-die compensation circuitry optimized for standard boost/SEPIC configurations.

Can LM3410YMFE/NOPB operate in SEPIC topology, and what modifications are needed?

Yes, LM3410YMFE/NOPB supports SEPIC operation per TI's Application Report SLVA392. Required changes include adding a second inductor (L2), coupling capacitor (C2), and reconfiguring feedback sensing - while retaining the same LM3410YMFE/NOPB IC, DIM control, and 525-kHz switching. The SEPIC variant maintains input-to-output isolation and regulates across input voltages both above and below the output (e.g., 2.7–4.5 V Li-ion to 3.3 V OLED), unlike standard boost.

What is the purpose of the DAP (die attach pad) on LM3410YMFE/NOPB, and how should it be connected?

The DAP on LM3410YMFE/NOPB serves as the primary thermal and electrical ground connection for both power (PGND) and signal (AGND) paths. It must be soldered to a dedicated PCB copper pour tied to the system ground plane using at least four 0.3-mm-diameter thermal vias - as specified in TI's SNVS541H datasheet Section 5 and Thermal Information Table 6.4. Failure to properly connect the DAP degrades thermal performance (R_θJA increases from 55.3°C/W to >100°C/W) and risks thermal shutdown.

How does the DIM pin function in LM3410YMFE/NOPB for LED brightness control?

The DIM pin on LM3410YMFE/NOPB accepts a logic-level PWM signal (0–100% duty cycle, 1 Hz–25 kHz) to modulate average LED current without altering regulation setpoint. When DIM is high (>1.8 V), the device operates normally; when low (<0.4 V), it enters ultra-low-power shutdown (80 nA). Unlike analog dimming, PWM dimming preserves LED color consistency and enables precise grayscale control in displays - as detailed in Section 7.3.2 of the LM3410YMFE/NOPB datasheet.